858993228 has 96 divisors (see below), whose sum is σ = 2284262400. Its totient is φ = 279070272.

The previous prime is 858993199. The next prime is 858993257. The reversal of 858993228 is 822399858.

858993228 is a `hidden beast` number, since 8 + 589 + 9 + 32 + 28 = 666.

It is an interprime number because it is at equal distance from previous prime (858993199) and next prime (858993257).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 707550 + ... + 708762.

It is an arithmetic number, because the mean of its divisors is an integer number (23794400).

Almost surely, 2^858993228 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 858993228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1142131200).

858993228 is an abundant number, since it is smaller than the sum of its proper divisors (1425269172).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

858993228 is a wasteful number, since it uses less digits than its factorization.

858993228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1388 (or 1380 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 54.

The square root of 858993228 is about 29308.5862504489. The cubic root of 858993228 is about 950.5973078388.

The spelling of 858993228 in words is "eight hundred fifty-eight million, nine hundred ninety-three thousand, two hundred twenty-eight".